<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card class="card_box">
      <el-row :gutter="10">
        <el-col :span="6">
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级 三级权限  -->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"
              >编辑</el-button
            >
            <el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all  :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //角色列表数据
      roleList: [],
      //控制分配权限对话框的显示隐藏
      setRightDialogVisible: false,
      //获取权限数据
      rightsList: [],
      //树形控件绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中的节点Id值数组
      defKeys:[],
      //当前即将分配的权限id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$axios.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.roleList = res.data;
      console.log(this.roleList);
    },
    //根据id删除对应得三级权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除

      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
          center: true,
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消删除");
      }
      const { data: res } = await this.$axios.delete(
        `roles/${role.id}/rights/${rightId}`
      );

      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      //   this.getRolesList();
      //把服务器返回的最新数据直接赋值
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
        this.roleId = role.id
        console.log(role);
      //获取所有权限数据
      const { data: res } = await this.$axios.get("rights/tree ");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限失败");
      }
      this.rightsList = res.data;
      console.log(this.rightsList);
        //递归获取三级权限
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true;
    },
    //通过手写递归获取角色下所有三级权限的id 并保存到defKeys数组中
    getLeafKeys(node,arr){
        //如果当前node借点不包含children属性  则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item=>this.getLeafKeys(item,arr))
           
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
        this.defKeys = []
    },
    //点击为权限分配
   async allotRights(){
        const keys=[
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys(),
        ]
        // console.log(keys);
        const idStr = keys.join (',')

       const {data:res} =  await this.$axios.post(`roles/${this.roleId}/rights`,{rids:idStr})
       if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    } 
  },
};
</script>

<style lang="scss" scoped>
.card_box {
  margin-top: 20px;
}
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
// 纵向上对齐
.vcenter {
  display: flex;
  align-items: center;
}
</style>